Another reason we all need our own pit box. I know this has happened to almost everyone at least once. You stop in the random box (as it is now) just as someone joins from spectate and rips out of the garage right into you. Though, whoever is joining midrace really should be watching for folks on pitroad before exiting the garage.
As most rules in LFS racing states (at least CRC rules), you should pit in the furthest box closest to pit exit. Certain tracks, Aston for example, these are the garages that new connections join at. Thus, I started pitting in the back boxes, which if someone follows you and is planning to pit in the front box, they can do as I stated earlier and accidently wreck into you.
So, whatever garage you join the server in, that should be your pitbox. If it were to be a skinnable banner style auto downloaded with the skins, then everyone would need to make sure it is skinned with their online nick, so everyone else would know it is yours if you are on pitroad with others. Not with some pretty design that wouldn't tell who's is who's.